Romans 12:17-18, “Recompense to no man evil for evil. Provide things honest in the sight of all men. If it be possible, as much as lieth in you, live peaceably with all men.”
A Christian who lives out his faith in front of the world WILL have enemies. Jesus did. Paul did. Getting even is in our DNA, but that is because we are sinful, fallen human beings with a sinful nature. Revenge is not a fruit of the Spirit! Verbal, emotional, or physical payback is not an option for the Christian. Aside from being backed into a corner where self-defense is necessary, if there is an escape available, take it. The Lord Jesus did not get even with his enemies. Neither did Paul.
The Christian must not play God and try to avenge himself. Returning evil for evil, or good for good, is the way most people live. But the Christian must live on a higher level and return good for evil. Of course, this requires love, because our first inclination is to fight back. It also requires faith, believing God can work and accomplish His will in our lives and in the lives of those who hurt us. We have to let God fight our battles for us, believing He can and will take care of our problems!